Accessories, Arduino & Components, Multimeters
18650 Lithium Battery Capacity Tester Module MAh MWh Digital Battery Power Detector Module
₨ 1,700
Dual-slot lithium battery capacity tester / battery discharge analyzer module, commonly sold as a 18650 battery capacity tester board. It is used to test the actual capacity, voltage, discharge performance, and internal characteristics of rechargeable lithium-ion cells.
Product Description
Dual-Slot 18650 Lithium Battery Capacity Tester Module with TFT Display
This electronic testing module is designed to measure the real capacity and discharge performance of lithium-ion batteries. It supports cylindrical rechargeable cells such as 18650, 26650, 21700, and similar 3.7V lithium batteries that fit within the battery holders,Lithium Battery Capacity Tester
Key Features
- Dual battery slots for testing one or two cells.
- TFT digital display for clear real-time readings.
- Displays:
- Battery voltage (V)
- Discharge current (A)
- Capacity (mAh)
- Energy (Wh)
- Test time
- Temperature status (depending on firmware version)
- Built-in power resistor load (white ceramic resistor) for controlled battery discharge.
- Multiple push buttons for setting test parameters and navigating menus.
- USB-C connector for module power supply.
- Automatic battery discharge and capacity calculation.
- Compact PCB design suitable for hobbyists, technicians, and battery recyclers.
Typical Specifications
| Parameter | Value |
|---|---|
| Battery Type | Li-ion/LiPo (3.7V nominal) |
| Supported Cells | 18650, 21700, 26650, etc. |
| Display Type | TFT |
| Power Input | USB Type-C (5V) |
| Capacity Measurement | mAh |
| Energy Measurement | Wh |
| Discharge Method | Constant load resistor |
| Test Channels | 1–2 batteries |
| Operating Voltage | Typically 2.5V–4.35V per cell |
Applications
- Testing new or used lithium-ion batteries.
- Sorting batteries by capacity.
- Battery pack matching.
- Quality control and maintenance.
- DIY power bank and battery projects.
- Recycling and refurbishing battery cells.
Visible Components in the Image
- Two battery holders (for cylindrical lithium cells).
- Large ceramic resistor used as the discharge load.
- TFT display showing voltage, current, capacity, and energy data.
- Control buttons for setting and starting tests.
- USB Type-C port for powering the tester.
- Microcontroller circuitry for measurement and calculations.
How It Works
- Insert a charged lithium-ion battery into the holder.
- Connect power through the USB-C port.
- Set the discharge parameters using the buttons.
- Start the test.
- The module discharges the battery through the load resistor.
- Capacity (mAh) and energy (Wh) are calculated automatically and displayed when the
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